* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
    color: white;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 300;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

.upload-section {
    margin-bottom: 30px;
}

.upload-area {
    border: 2px dashed rgba(255, 255, 255, 0.5);
    border-radius: 15px;
    padding: 60px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.upload-area:hover {
    border-color: rgba(255, 255, 255, 0.8);
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.upload-area.dragover {
    border-color: white;
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.02);
}

.upload-icon {
    width: 60px;
    height: 60px;
    color: white;
    margin-bottom: 15px;
}

.upload-text {
    color: white;
    font-size: 1.2rem;
    font-weight: 300;
}

.controls {
    background: white;
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 15px;
}

.control-group label {
    font-weight: 500;
    color: #555;
}

input[type="range"] {
    width: 150px;
    height: 6px;
    border-radius: 3px;
    background: #ddd;
    outline: none;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #667eea;
    cursor: pointer;
}

#speedValue {
    font-weight: bold;
    color: #667eea;
    min-width: 20px;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.btn.primary {
    background: #667eea;
    color: white;
}

.btn.primary:hover {
    background: #5a6fd8;
    transform: translateY(-1px);
}

.btn.secondary {
    background: #f1f3f4;
    color: #333;
}

.btn.secondary:hover:not(:disabled) {
    background: #e8eaed;
    transform: translateY(-1px);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.display-area {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin: 20px;
    max-height: 70vh;
}

.teleprompter-container {
    height: 500px;
    overflow-y: auto;
    overflow-x: hidden;
    position: relative;
    background: #000;
    cursor: grab;
    scrollbar-width: thin;
    scrollbar-color: #666 #222;
}

.teleprompter-container::-webkit-scrollbar {
    width: 8px;
}

.teleprompter-container::-webkit-scrollbar-track {
    background: #222;
}

.teleprompter-container::-webkit-scrollbar-thumb {
    background: #666;
    border-radius: 4px;
}

.teleprompter-container::-webkit-scrollbar-thumb:hover {
    background: #888;
}

.teleprompter-container:active {
    cursor: grabbing;
}

.teleprompter-content {
    padding: 20px;
    transform: scaleX(-1);
    transition: transform 0.3s ease;
    min-height: 100%;
}

.teleprompter-content img {
    width: 100%;
    height: auto;
    display: block;
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

/* 全屏模式无边框 */
.display-area.fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 999;
    border-radius: 0;
    margin: 0;
    max-height: none;
}

.display-area.fullscreen .teleprompter-container {
    height: 100vh;
    border-radius: 0;
    margin: 0;
    padding: 0;
}

.display-area.fullscreen .teleprompter-content {
    padding: 0;
}

.display-area.fullscreen .teleprompter-content img {
    border-radius: 0;
    box-shadow: none;
    margin-bottom: 0;
}

/* 滚动提示 */
.scroll-indicator {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.5);
    color: white;
    padding: 8px 12px;
    border-radius: 20px;
    font-size: 12px;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    z-index: 10;
}

.teleprompter-container:hover .scroll-indicator {
    opacity: 1;
}

.loading {
    text-align: center;
    color: white;
    padding: 40px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.btn-icon {
    width: 16px;
    height: 16px;
    margin-right: 8px;
    vertical-align: middle;
}

.floating-controls {
    position: fixed;
    top: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.floating-controls:hover {
    background: rgba(0, 0, 0, 0.9);
    transform: translateY(-2px);
}

.float-btn {
    width: 45px;
    height: 45px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

.float-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.float-btn svg {
    width: 20px;
    height: 20px;
}

.float-speed-control {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 10px;
}

.float-speed-control input[type="range"] {
    width: 100px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
}

.float-speed-control input[type="range"]::-webkit-slider-thumb {
    width: 14px;
    height: 14px;
    background: white;
}

#floatSpeedValue {
    color: white;
    font-size: 0.9rem;
    font-weight: bold;
    min-width: 25px;
}

/* 全屏模式样式 */
.display-area.fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 999;
    border-radius: 0;
    margin: 0;
}

.display-area.fullscreen .teleprompter-container {
    height: 100vh;
    border-radius: 0;
}

/* 全屏时隐藏原控制面板 */
body.fullscreen .controls {
    display: none !important;
}

@media (max-width: 768px) {
    .controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .control-group {
        justify-content: center;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .teleprompter-container {
        height: 400px;
    }
}